c# winform 應用編程代碼總結 1

1、漸顯的表單

     放一個定時器Interval 設定為100 ， 在響應的函數中添加

        private void Form1_Load(object sender, System.EventArgs e)        {            this.timer1.Enabled=true;            this.Opacity=0;        }        private void timer1_Tick(object sender, System.EventArgs e)        {            if(this.Opacity<1)            {                this.Opacity=this.Opacity+0.05;            }            else            {                this.timer1.Enabled=false;            }        }

2、設定最上層視窗

       把TopMost 、 TopLevel 都設定為true就OK了！

3、設定一個多邊形的視窗

     引入要使用的函數

[DllImport("gdi32")]private static extern IntPtr CreatePolygonRgn(Point[] lpPoint,int nCount,int nPolyFillMode);[DllImport("user32")]private static extern IntPtr SetWindowRgn(IntPtr hWnd,IntPtr hRgn,bool bRedraw);

 

       在視窗load的時候設定形狀！

            Point[] pt={                            new Point(this.Width /2,0),                            new Point(0,this.Height/2),                            new Point(this.Width/2,this.Height),                            new Point(this.Width,this.Height/2),                            new Point(this.Width,0)                        };                        IntPtr m_rgn;            m_rgn=CreatePolygonRgn(pt,5,WINDING);            SetWindowRgn(this.Handle,m_rgn,true);

4、設定圓形視窗

        [System.Runtime.InteropServices.DllImport("gdi32")]        private static extern IntPtr BeginPath(IntPtr hdc);        [System.Runtime.InteropServices.DllImport("gdi32")]        private static extern int SetBkMode(IntPtr hdc,int nBkMode);        const int TRANSPARENT = 1;        [System.Runtime.InteropServices.DllImport("gdi32")]        private static extern IntPtr EndPath(IntPtr hdc);        [System.Runtime.InteropServices.DllImport("gdi32")]        private static extern IntPtr PathToRegion(IntPtr hdc);        [System.Runtime.InteropServices.DllImport("gdi32")]        private static extern int Ellipse(IntPtr hdc, int X1,int Y1, int X2,int Y2);        [System.Runtime.InteropServices.DllImport("user32")]        private static extern IntPtr SetWindowRgn(IntPtr hwnd,IntPtr hRgn,bool bRedraw);        [System.Runtime.InteropServices.DllImport("user32")]        private static extern IntPtr GetDC(IntPtr hwnd);        private void Form1_Load(object sender, System.EventArgs e)        {            IntPtr dc;            IntPtr region;            dc=GetDC(this.Handle);             BeginPath(dc);            //根據路徑建立不規則表單            SetBkMode(dc,TRANSPARENT);            //設定為透明模式            Ellipse(dc,20,20,220,220);            EndPath(dc);            region=PathToRegion(dc);            SetWindowRgn(this.Handle,region,true);                }    const int WM_NCHITTEST = 0x0084;    const int HTCLIENT = 0x0001;    const int HTCAPTION = 0x0002;    protected override void WndProc(ref System.Windows.Forms.Message m)        {            switch(m.Msg)            {                case WM_NCHITTEST:                    base.WndProc(ref m);                    if (m.Result==(IntPtr)HTCLIENT)                        m.Result=(IntPtr)HTCAPTION;                    break;                default:                    base.WndProc(ref m);                    break;            }        }    }

5 、漸層的視窗背景

      private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)     {            Graphics g=e.Graphics;            Color FColor=Color.Blue;            Color TColor=Color.Yellow;            Brush b =new LinearGradientBrush(this.ClientRectangle, FColor, TColor, LinearGradientMode.ForwardDiagonal);            g.FillRectangle(b,this.ClientRectangle);      }      private void Form1_Resize(object sender, System.EventArgs e)      {            this.Invalidate();      }

 

6、無標題視窗的拖動

        [DllImport("user32.dll")]        public static extern bool ReleaseCapture();        [DllImport("user32.dll")]        public static extern bool SendMessage(IntPtr hwnd,int wMsg,int wParam,int lParam);                                                                                                                                                                 public const int WM_SYSCOMMAND=0x0112;        public const int SC_MOVE=0xF010;        public const int HTCAPTION=0x0002;                private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)        {            ReleaseCapture();            SendMessage(this.Handle,WM_SYSCOMMAND,SC_MOVE+HTCAPTION, 0);         }

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作者：RyanDing